Packera millefolium

(Torrey & A. Gray) W. A. Weber & Á. Löve

Phytologia 49: 47. 1981.

Common names: Piedmont ragwort
IllustratedEndemicConservation concern
Basionym: Senecio millefolium Torrey & A. Gray Fl. N. Amer. 2: 444. 1843
Synonyms: Senecio memmingeri Britton ex Small
Treatment appears in FNA Volume 20. Treatment on page 591. Mentioned on page 575, 586, 592.

Perennials, 25–60+ cm; fibrous-rooted (caudices branched). Stems 1 or 2–3, clustered, glabrous or leaf-axils sparsely hairy. Basal leaves (and proximal cauline) petiolate; blades narrowly ovate to ovate (2–3 times pinnately dissected, ultimate lobes mostly linear to filiform), 50–80 × 30–50 mm, bases ± truncate or auriculate, ultimate margins entire or remotely dentate. Cauline leaves gradually reduced (petiolate or sessile, similar to basals). Heads 10–30+ in open, corymbiform arrays. Peduncles bracteate or ebracteate, glabrous. Calyculi 0. Phyllaries (13–) 21, green, 4–6 mm, glabrous (tips sometimes hair-tufted). Ray-florets 8–10 (–13); corolla laminae 8–12 mm. Disc-florets 35–50+; corolla-tubes 2–3 mm, limbs 1.5–2.5 mm. Cypselae 0.75–1.5 mm, hairy on ribs; pappi 3–4 mm.


Phenology: Flowering early May–mid Jun.
Habitat: Open areas along streams, rock outcrops in thin, granitic-derived soils
Elevation: 400–900 m

Discussion

Of conservation concern.

Packera millefolia is known only from granitic soils in the southern Appalachians. It is similar in overall aspect to the widespread P. anonyma; it differs by its 2–3 times pinnately dissected leaves.

Selected References

None.

Lower Taxa

None.
... more about "Packera millefolium"
not tailed +, rounded +  and obtuse +
papillate +
truncate-penicillate +
scarious +
usually ovate +  and lance-linear +
corymbiform +  and open +
indeterminate +  and determinate +
Debra K. Trock +
(Torrey & A. Gray) W. A. Weber & Á. Löve +
auriculate +  and truncate +
Senecio millefolium +
5 cm50 mm <br />0.05 m <br /> (8 cm80 mm <br />0.08 m <br />) +
narrowly ovate;ovate +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
winged;nerved;ribbed +
Piedmont ragwort +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
pale-yellow +  and deep orange-red +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
cylindric +
fertile +  and bisexual +
fertile +  and bisexual +
Ga. +, N.C. +, S.C. +  and Va. +
400–900 m +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Open areas along streams, rock outcrops in thin, granitic-derived soils +
discoid +  and radiate +
in compact or congested to open corymbiform cymiform or subumbelliform , , , arrays +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
campanulate;cylindric +
sessile +  and petiolate +
cauline +  and basal +
erect;recurved +
deltate +
dentate to pinnatifid +  and entire +
2-carpellate +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
ebracteate +  and bracteate +
Flowering early May–mid Jun. +
linear +  and ensiform +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
bearing subulate enations +, hairy +  and bristly +
conic;usually flat;convex +
exalbuminous +
Illustrated +, Endemic +  and Conservation concern +
prostrate +  and ascending +
2 +  and 3 +
appendaged +  and truncate +
papillate +
Senecio memmingeri +
Packera millefolium +
species +
campanulate +
serrate +  and denticulate +
25 cm250 mm <br />0.25 m <br /> (60 cm600 mm <br />0.6 m <br />) +
vine +, tree +, shrub +  and subshrub +
23 +, 22 +  and 20 +